For the HR cases with more diversity, we newly release a group of high-quality images collected from Flickr with downloading permissions from owners, called HR-Flickr.
HR-Flickr consists of 500/500/490 HR images with resolutions 1k, 2k and 4k respectively as shown in Fig. REF . Images from each group of specific resolution have maximum side lengths which are equal to the corresponding group resolution (1024, 2048, 4096).
Moreover, images with persons are eliminated by segmentation methods and manual checking from HR-Flickr to reduce the privacy risk as far as possible. Compared with other HR dataset, such as DIV2K and Flickr2K [1]}, our dataset contains 4k images. Besides, HR-Flickr has more diverse and challenging cases for image inpainting, while we manually filter images with too simple textures or monotonous scenes.
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